Protective pot for multiple twist spindles



Sept. 26, 1967 G. FRANZEN ETAL 3,343,359

PROTECTIVE POT FOR MULTIPLE TWIST SPINDLES 4 Sheets-Sheet l Filed Jan.

FIG. 1

illiionnnnnnii 4.Sheets-Sheet 2 G. FRANZEN ETAL` mill-mmm Sept. 26,1967,

PROTECTIVE POT FOR MULTIPLE TWIST SPIDLES Filed Jan; 51, 1967 Sept. 26,1967 l I G. FRANZEN ETAI. 3,343,359

PROTECTIVEPT FOR MULTIPLE TWIST SPINDLES y Filed Jan. "51, 19e? 4Sheets-Sheet 5 Sept. 26, 1967 FRANZEN ETAL PROTECTIVEv POT FOR MULTIPLETWIST sPINDLEs Filed Jan. 3l, 1967 4 Sheets-Sheet 4.

United States Patent O 3,343,359 PROTECTIVE POT FOR MULTIPLE TWISTSPINDLES Gustav Franzen, Neersen, near Krefeld, Kurt Brisken,

Munchen-Gladbach, and Ulrich Lossa, Krefeld, Germany, assignors toPalitex Project-Company G.m.b.H., Krefeld, Germany Filed Jan. 31, 1967,Ser. No. 612,848

Claims priority, application Germany, Feb. 7, 1966,

9 Claims. (Cl. 57-58.76)

ABSTRACT OF THE DISCLOSURE The present invention relates to a protectivepot for multiple twist spindles, especially two-for-one spindles,according to which the pot consists of a lower section and of at leastone upper section detachably connected to the lower section Whilemagnetic means are carried by one of said sections on the inside thereofat the area where the lower section joins the adjacent upper section.

The present invention relates to a protective pot for multiple twistspindles, especially two-forone spindles, according to which the saidtop is freely rotatably journalled on the spindle rotor, but is adaptedby means of a pair of magnets to |be prevented from rotation. Of each ofsaid pairs of magnets, one magnet is mounted on the mantle of theprotective pot approximately within the area of the largest radialextension of the thread balloon.

With most of the heretofore known protective pots, the pot magnets arearranged directly at the bottom of the pot or in the immediate vicinityof the bottom. Such an arrangement has the drawback that the structuralheight of the spindle is greater by the height of the magnets in the potbottom, than would be possible if the magnet bodies were not mounted inthis area.

Other heretofore known protective pots, in an endeavor to avoid theabove mentioned drawback have the magnets arranged at the upper marginalportion of the protective pot. If these pot ma-gnets in this instanceare arranged on the outside of the pot, the balloon-shaped circulatingthread will .at least during the starting phase hit against the said toppot magnets.

If the -pot magnets are arranged on the inside, they narrow down thefree space within the pot, which fact impedes the insertion of thedelivery bobbin or reduces the maximum possible diameter of the bobbin.

Other heretofore known suggestions have overcome these drawbacks bydesigning the protective pot mantle, not cylindrical, but in the shapeof the thread balloon; in other words, with an outwardly arched portion,so that the magnets will find suicient space at approximately half theheight of the pot within the Iarea of the maximum balloon extension,while the cylindrical inner space permits the insertion of a deliverybobbin without loss in volume.

This shape of the protective pot, and the provision of magnets in theinterior thereof increases the cost of manufacture. While a cylindricalprotective pot can be formed by a sheet metal cylinder to be connectedwith the bottom of the pot, a protective pot mantle which narrows at theupper marginal portion and is also narrowed at the bottom requiresexpensive shaping tools, for instance, complicated drawing tools whenthe pot in its entirety or only the protective pot mantle is produced bymeans of drawing tools or curving tools, or complicated casting toolsare required when the pot is tobe cast.

In addition to the above mentioned technical manufacturing difficulties,there are also encountered further difficulties when inserting themagnets for which special pockets have to be molded in or which in casethat such pockets are cemented in or soldered in requireed adjustingsteps in order to assure the desired position of the magnets on theinner wall of the protective pot.

It is, therefore, an object of the present invention to provide aprotective pot for multiple twist spindles, especially two-for-onetwisting spindles of the above mentioned shape, which will manufacturethereof.

It is another object of this invention to provide a protective pot, asset forth in the preceding paragraph, which will facilitate theinsertion of the magnets. 1

Still another object of this invention consists in the provision of aprotective pot as set forth above, which will without difiicultiespermit the exchange of parts of the pot for other parts in such a waythat by exchanging parts, it will be possible to produce protective potsof different height which can also be equipped in a different way withmagnets so that also bobbins of diiferent height can be employed.

These and other objects and advantages of the invention will appear moreclearly from the following specification, in connection with theaccompanying drawings, in which:

FIGURE l illustrates a spindle rotor supporting a protective potaccording to the invention with a delivery bobbin therein. i

FIGURE 2 is a section along the line II-II of FIG. 1 with the deliverybobbin removed.

FIGURE 3 illustrates a spindle rotor supported modified protective potaccording to the invention with a delivery bobbin therein.

FIGURE 4 is a section taken along the line IV-IV of FIG. 3 without adelivery bobbin.

FIGURE 5 shows a still further modification of a protective potaccording to the invention with a delivery bobbin therein.

FIGURE 6 i-s still another modied protective pot according to theinvention with a pot ring of two superimposed ring members.

FIGURE 7 is a perspective view of the lower ring member of the pot ringwith inserted pot magnets.

The present invention is characterized primarily in that the protectivepot is composed of a lower pot section and at least an upper pot ringdetachably connected to said lower pot section while a separating gap islocated within the r-ange of the pot magnets, i.e. approximately withinthe range of the largest radial extension of the pot which coincidesapproximately with the largest radial expansion of the thread balloon.Such an arrangement brings about that the protective pot can be designedof a lower pot section which widens toward the opening marginal portionso that the pot will have a shape which when being produced as a castpiece or as a drawn piece will encounter no particularly difliculties.The same applies to the pot ring and even to the employment of aplurality of pot rings which are superimposed on each other upon the potsection.

Inasmuch as the magnets are arranged within the area of the separatinggap, the pot magnets can be inserted prior to the connection of potsection and pot ring. The location of the pot magnets can beunequivocally ascertained in advance by correspondingly shaping anddesigning the pot section and pot ring within the range of theseparating gap. Moreover the insertion of the pot magnets is facilitatedin view of the fact that they can be inserted axially.

Referring now to the -drawings in detail, the arrangement shown thereincomprises a spindle rotor 1, having freely rotatably joumalled thereinthe carrier 2 for the delivery bobbin, said carrier forming a functionalunit with the protective pot generally designated 3. Outside permitaparticularly simple pot 3, as shown in FIGS. 1 to 4, there are arrangedtwo or more magnets 4, which by means of other parts are supported bythe balloon confining means (not shown), separators (not shown), orother non-illustrated machine frame portions.

The protective pot 3 according to FIGS. 1 and 2, comprises a pot membergenerally designated 5 composed of the pot 'bottom 5a and the bottomring 5b. Pot member 5 widens in upward direction and has at its uppermarginal portion an inwardly directed annular constriction 6 in whichare mounted the pot magnets 7. The pot ring 8 is placed from above uponthe pot member 5 so as to pass over the constriction 6 and the potmagnets 7. The said pot ring 8 rests on the edge 9 of the annularconstriction 6. Pot ring 8 tapers in upward direction in such a way thatthe diameter of the upper edge approximately equals the diameter of thepot bottom 5a. The said constriction 6 is so selected that it will notextend inwardly into a cylinder mantle the diameter of which isdetermined by the free diameter of the free diameter of the upper edgeof the protective pot so that the insertion of a delivery bobbin 10 witha maximum diameter will be possible.

As will be clearly evident from FIG. 1 the separating gap between thelower pot member 5 and the upper pot ring 8 is located directly belowthe pot magnets 7, i.e. approximately within the area of the maximumradial extension of the thread balloon or within the range of themaximum radial extension of the protective pot.

The embodiment according to FIGS. 3 and 4 differs from that of FIGS. 1and 2 primarily in that the lower edge of the pot ring 8a has aninwardly directed annular constriction 6a, in which are mounted the potmagnets 7, and furthermore differs from FIGS. 1 and 2 in that the potring 8a is placed upon the pot member 5 which with this embodiment formsa single piece. The upper edge of pot member 5 extends from the outsideover the constriction 6a and thus encloses the pot magnets 7. In thisinstance, the pot ring 8a rests by means of its shoulders 9a on the potmember 5 and by means of its lower edge rests on the annular step 9b ofpot member 5. The support of the pot magnets 7 is effected by theannular step 9c of pot member 5.

The structure of pot member 5 and of pot ring 8a within the area of potmagnets 7 clearly indicates that the insertion of the pot magnets 7 aswell as the connection pot member 5 with pot ring 8 can easily beeffected, and that no diiculties will be encountered if it is desired toexchange the illustrated elements for elements of different height,provided the diameters within the area of the connection of said members5 and 8 remain the same.

The embodiment of FIG. 5 is similar to that of FIGS. 3 and 4 with theexception that the pot ring 8b is, by means of a fold 9b at its loweredge placed upon the pot member 5. In this instance, the annularconstriction 6 or 6a is missing. Instead, the pot magnets 7 are coveredfrom the inside by a covering 11 which by means of its edges rests onthe annular steps 12 and 13 of pot member 5 and pot ring 8b.

If desired, the pot magnets 7 may be directly connected to the covering11 and thus together with the latter may be inserted as a unit betweenpot member- 5 and pot ring 8b.

The step of locating the covering 11 with the pot magnets 7 mayfurthermore be improved by designing the covering ring 11 which carriesthe pot magnets 7 in the form of a speration ring so that the connectionwill be improved by a spring tension.

According to the embodiment shown in FIG. 6 the pot member 5 similar toFIG. 1 comprises a pot bottom 5a and a bottom ring 5b which latter,however, lacks the constriction 6 of FIG. 1. Placed upon the pot member5 is a two-sectional pot ring, the narrower ring 14 of which, carriesembedded therein the pot magnets 7, whereas the second considerablywider and upper ring 8c is slipped on. The individual elements of theprotective pot mantle 3 are also with this embodiment axially slippedupon each other, and this slipping on step of ring 14 also places thepot magnets 7 at their proper place. This embodiment makes the exchangeof the individual rings particularly simple and also the exchange of themagnets.

As is clearly indicated in FIGS. 6 and 7, it is particularlyadvantageous to make the ring 14 of synthetic material as, for instance,copolymers of acrylonitrile, butadiene and styrene and to embed the potmagnets 7 directly in said ring. Advantageously, there is employed theinner cover 15.

Similar to the preceding embodiments, the separating gaps of theindividual protective pot mantle parts are located within the area ofthe respective largest radial extension whereby the manufacture of theindividual elements are made particularly simple, and above all, theassembly and the exchange of the parts is considerably facilitated.

As will be evident from the preceding description of the variousembodiments of the invention, a continuous outer mantle surface of theprotective pot is obtained while the pot magnets arranged in a radiallyinwardly protruding manner are located within the area of the largestpot extension and thus will not extend into the inner cylindrical spacein which the delivery bobbin is located so that the thread withdrawalwill not be impeded by the magnets.

The design according to the present inevntion furthermore assures thatthe pot member and the pot ring positively interengage each other whilesimultaneously, in view of the annular support, the magnets are locatedat a definite level and can be inserted prior to the assembly of potmember and pot ring.

It will also be noted that due to the fact that the protective pot onthe inside hereof, has a closedring covering he pot magnets, thread orlint is prevented from direct contact with the magnet so that theycannot settle there- Due to the fact that the pot magnets can beconnected to the cover ring, the insertion of the pot magnets can beeffected simultaneusly with the insertion of the cover ring.

It `will also be evident from the preceding description, the fact thatthe protective pot is subdivided into three sections makes the assemblyof the protective pot particularly simple and above all, yields thepossibility of exchanging the individual rings against rings ofdifferent widths whereby the height of the protective pot can easily beadapted to the respective requirements without any fundamental change inthe construction of the pot. Above all, there is obtained thepossibility of producing protective pots of diiierent heights inconformity with the so-called building block system. This is aparticularly valuable advantage with respect to the manufacturingprocess which permits an economical manufacture of protective pots ofdifferent dimensions. This fact also furnishes the possibility whileemploying the same pot parts and pot rings to produce protective potswith different diameter within the range of the largest balloonextension. Also the separator has the possibility merely by exchangingindividual pot rings to adapt the pot to different dimensions of thedelivery bottom without the necessity to exchange the entire pot.

By making the lower narrow ring of synthetic material in which the potmagnets are embedded, the weight of the protective pot can beconsiderably reduced. There exists also the possibility of producing thepot member and all pot rings of synthetic material provided it has thenecessary rigidity; such synthetic material may be copoylmers ofacrylonitrile, butadiene and styrene.

It is, of course, to be understood that the present inven-r tion is, byno means, limited to the particular embodiments illustrated in thedrawings, but also comprises any modifications within the scope of theappended claims.

What 'we claim is:

1. A protective pot for multiple twist spindles, espepecially fortwo-for-one spindles, adapted to receive a bobbin therewithin and to bemounted on a spindle rotor, which includes: a lower pot section, atleast one upper pot section detachably connected to said lower potsection, and magnet means mounted on one of said pot sections forcooperation with magnets outside said pot to hold the same stationary,at least one joint between two adjacent pot sections being locatedwithin the range of said magnet means.

2. A pot according to claim 1, in which the upper marginal portion ofsaid lower pot section is provided with inwardly directed annulardepression means having said magnet means mounted thereon, said upperpot section extending outwardly over said magnet means so as to coversaid depression means toward the outside.

3. A pot according to claim 1, in which the lower marginal portion ofthe one upper pot section which is detachably connected to said lowerpot section is provided with inwardly directed annular depression meanshaving said magnet means mounted thereon, said one upper pot sectionbeing detachably mounted on said lower pot section, `and the uppermarginal portion of said lower pot section extending over saiddepression means so as to cover said depression means toward theoutside.

4. A pot according to claim 1, in which the upper marginal portion ofsaid lower pot section has its inner wall surface provided with at leastone annular step for receiving and supporting said magnet means, and inwhich the lower marginal portion of said one upper pot section which isdetachably connected to said lower pot section is provided with angemeans resting on said lower pot section.

5. A pot according to claim 1, in which both the inner Wall `surface ofthe upper marginal portion of said lower pot section and the inner wallsurface of the one upper pot section which is detachably connected tothe lower pot section are respectively provided with annular steps, andannular cover means resting in said steps for covering said magnet meanstoward the inside of said pot.

6. A pot according to claim 5, in which said magnet means are connectedto said annular cover means.

7. A pot according to claim 5, in which said annular cover means is inthe form of a spring ring.

8. A pot according to claim 1, in which the upper pot section comprisesa lower relatively narrow annular member adapted to be placed on saidlower -pot section and supporting said magnet means, and also comprisesan upper relatively wider annular member adapted to be placed on saidannular relatively narrow member.

9. A pot according to claim 8, in which said lower relatively narrowannular member consists of synthetic material having the magnetic meansembedded therein.

References Cited UNITED STATES PATENTS 2,563,641 8/1951 Colurnbu et al.57-58.76 XR 2,625,786 1/1953 Klein 57-58.44 2,731,786 1/1956 Klein57--58.76 X 2,961,824 1l/196O Klein 57-58.83 X 3,159,962 12/1964 Franzen5758.49 3,177,643 4/1965 Halleux et al 57-58.83 X

FRANK I. COHEN, Primary Examiner. D. WATKINS, Assistant Examiner.

1. A PROTECTIVE POT FOR MULTIPLE TWIST SPINDLES, ESPEPECIALLY FORTWO-FAR-ONE SPINDLES, ADAPTED TO RECEIVE A BOBBIN THEREWITHIN AND TO BEMOUNTED ON A SPINDLE ROTOR, WHICH INCLUDES: A LOWER POT SECTION, ATLEAST ONE UPPER POT SECTION DETACHABLY CONNECTED TO SAID LOWER POTSECTION, AND MAGNET MEANS MOUNTED ON ONE OF SAID POT SECTIONS FORCOOPERATION WITH MAGNETS OUTSIDE SAID POT TO HOLD THE SAME STATIONARY,AT LEAST ONE JOINT BETWEEN TWO ADJACENT POT SECTIONS BEING LOCATEDWITHIN THE RANGE OF SAID MAGNET MEANS.